The point is that a few months ago I noticed that my car will cost a little start in the morning, last month I changed the battery in Audi workshop and last thing has gotten worse, because now begins the third and start "tac,tac,tac" with the engine and white smoke from the exhaust. The rest of the day starts perfectly the first time and does not vibrate and smoke check. I pray you opinions and suggestions seriously, because I want to fix the problem before it gets bad weather, as I walk down hill. I know this is a widespread problem in the engines BKD, but I have not found a good answer on the solution. Thanks and regards.